diff --git a/regress/unittests/misc/test_hpdelim.c b/regress/unittests/misc/test_hpdelim.c
index a6e993671..9da0159dc 100644
--- a/regress/unittests/misc/test_hpdelim.c
+++ b/regress/unittests/misc/test_hpdelim.c
@@ -1,4 +1,4 @@
-/* 	$OpenBSD: test_hpdelim.c,v 1.1 2022/02/04 07:53:44 dtucker Exp $ */
+/* 	$OpenBSD: test_hpdelim.c,v 1.2 2022/02/06 22:58:33 dtucker Exp $ */
 /*
  * Regress test for misc hpdelim() and co
  *
@@ -39,6 +39,17 @@ test_hpdelim(void)
 	DONE_STRING();
 	TEST_DONE();
 
+	TEST_START("hpdelim :port");
+	START_STRING(":1234");
+	cp = hpdelim(&str);
+	ASSERT_STRING_EQ(cp, "");
+	ASSERT_PTR_NE(str, NULL);
+	port = hpdelim(&str);
+	ASSERT_STRING_EQ(port, "1234");
+	ASSERT_PTR_EQ(str, NULL);
+	DONE_STRING();
+	TEST_DONE();
+
 	TEST_START("hpdelim host:port");
 	START_STRING("host:1234");
 	cp = hpdelim(&str);